Wheat Fighting Prevention Tips

The first is freezing damage during the winter. From the end of November to the beginning of December, if there is severe frost or freezing rain, it can easily cause freezing damage during the winter. When the degree of cold damage is light, the young stems of the main stem and the big shoots are frozen, and the leaves are severely crumpled. Even if the ear is heading, the top and bottom ends are seriously damaged. When the freezing damage is severe, the wheat leaves and tips are dry or blue and the heart leaves are dehydrated. death. The second is to return to the cold period of freezing. Usually refers to the effect of cold spring.

Factors Affecting Freeze Damage of Wheat

Variety and sowing date, sowing volume is the main factor. Secondly, many farmers have abused chemical fertilizers, leading to the first prolonged growth period of wheat before winter, which not only exacerbates freezing injury, but also leads to defertilization in the later stages of fertility.

Here, the farmers did not handle the straw well before sowing and formed a “flock nest”; the quality of the rotary tillage after the deep plowing was poor, and the roots “hanged the air”; after the rotary tillage, there was no depression and the seeding was too deep; Seed rooting seedlings; Poor sowing before sowing, pouring head water to make soil cracks, etc., are easily induced wheat freeze injury.

Wheat freeze injury prevention measures

The timely and deep plowing of the long seedlings. Scratching can not only relieve the soil compaction, but also increase the surface temperature; artificial destruction of the wheat base can control the growth and control of “hanging empty seedlings”.

Winter irrigation timely. Winter irrigation should be about 4°C, which is the average temperature. If the temperature is below this temperature, there is a risk of freezing injury during winter irrigation. Winter irrigation also depends on the soil, seedlings, and lyrical conditions, clay should be early irrigation, sand land should be irrigated later, rice fields or rice fields can be good irrigation without irrigation. Rejuvenation of weak seedlings in early spring is the necessary measure to prevent cold in the spring.

Cover grass, cover dung, and ram soil around the roots. Before the winter, the ploughing and ramming of the soil can effectively prevent the winter wheat from freezing. After the wheat enters the wintering period, 300-400 kilograms of wheat bran, wheat straw, or other plant waste can be applied between the rows of wheat, or a layer of manure (commonly known as “warm ditch manure”) can be applied along the ridge. Not only to protect the wind, but also warming antifreeze, and supplement the nutrients for the wheat seedlings to grow green.

Timely control. During the wintering period, spraying the wheat seedlings with 0.3% to 0.5% chlorcholine solution can inhibit plant growth and resist or reduce the occurrence of freezing injury. In the period of returning to the green age, spraying a certain amount of chlormechanin to control wheat prosperous growth before sowing of cold air can effectively reduce the damage to wheat.

Spraying nutrient solution. When wheat enters the green stage, potassium dihydrogen phosphate and humic acid, alginic acid, and amino acid foliar fertilizers are sprayed in time, which has the effect of strong roots and strong seedlings. After the end of spring, quickly in the morning of the next day from 10:00 am to 3:00 pm, 100 grams of potassium dihydrogen phosphate per acre + alizarin or 10 ml of sea chlorophyll + diniconazole or difenoconazole 15 G + 15 grams of zinc sulfate field spray, did not return to Qingshui timely irrigation, to prevent the occurrence of frost damage.

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